Certificate key not supported on windows xp

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I have used vs2010 and silverlight 5 to access scanner in web browser.

I was created the certificate key to sigh the xap on windows 7.

I was install the certificate into "tursted publishers" on windows 7 client machine, its working fine to me.

At same time i was not able to get either function to work when certificate install into "trusted publishers" on window XP client machine.

Is there any difference on certificate stores between windows 7 and windows XP?
How to work with windows XP...?

Thanks in advance.

Posted 24-Apr-13 19:15pm

Sugu.s

Updated 24-Apr-13 19:36pm

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Eugene Mayeski · Answer 1 · 2013-04-24T19:38:00

Solution 1

Check the signing algorithm in certificate properties. If it's SHA2 (SHA256, SHA512) certificate, it won't work on XP without proper updates.

Posted 24-Apr-13 19:38pm

Eugene Mayeski

Comments

Sugu.s 25-Apr-13 2:20am

Hi Eugene,
It was SHA1 certificate. If it seems certificate issue. how can i create certificate to access on windows XP and Windows 7 machines

Eugene Mayeski 25-Apr-13 2:31am

And what does certificate properties say regarding validity of the certificate? Right-click on the certificate file (or the signed file) in Explorer to find certificate properties.

Sugu.s 25-Apr-13 5:21am

The Certificate Properties dialog box displays certificate property values on four tabs.

Certificate Properties General Tab
Certificate Properties Cross-Certificates Tab
Certificate Properties OCSP Tab
Certificate Properties Extended Validation Tab

Eugene Mayeski 25-Apr-13 9:46am

That's great. What those properties say in regards to validity ?

Sugu.s 26-Apr-13 0:34am

Did you mean expire date of key. That is 4/18/2014.

Eugene Mayeski 26-Apr-13 0:59am

No. Certificate validity is determined using a number of criteria, not just expiration. Those tabs that you have listed should show various information related to validity of the certificate. For example, they can show that the Root CA certificate is not found, or that certificate's signature could not be checked or something like that. Doing inspection on the system in question can reveal the source of your problem.

Sugu.s 29-Apr-13 9:21am

It seems not certificate issue. I found that XP could not read WIA. When i going to create object like AutomationFactory.CreateObject("WIA.CommonDialog")), i got error as "No object was found registered for specified ProgID".

My code is,
try
{
using (dynamic CommonDialog = AutomationFactory.CreateObject("WIA.CommonDialog"))
{
dynamic imageFile = CommonDialog.ShowAcquireImage();
if (imageFile != null)
{
if (!Directory.Exists("D:\\ScanImage"))
{
Directory.CreateDirectory("D:\\ScanImage");
}
string filePath = string.Format("D:\\ScanImage\\{0}.jpg", Guid.NewGuid());
imageFile.SaveFile(filePath);
}
}
}